Congrats
Get some baby name books & look in the X & Z sections.. You will find all sorts of cool names
Zander is a nifty name.. Ezekiel, or Zeke.. I really like Xavier.. Ximon is interesting.
I've always liked the name Noah, and I have only met one Noah, & He was cool as hell.
There is always the Q's.. Quade, Quentin, Quinlan, or Quin.
I also think Vaughn is a nifty name.
Have fun with it.. Just remember that children do tend to take on the aspects of their names, so I would avoid names with negative connotations.